Abstract:Healthy，mechanically damaged and inoculated（with Penicillium digitatum）Citrus reticulata Blanco cv.Shatangju fruits were treated by bamboo pyroligneous acid（BPA）solutions at different concentrations（50，150 mL/Land250mL/L）and distilled water（control）and then stored at room temperature（25±1）℃.The storage effect was evaluated by indicators such as rot rate，infection rate，disease index of spots，and total flavonoid content（TFC），total phenolics content（TPC）and the activities of phenylalanine ammonia lyase（PAL）and peroxidase（POD）in pericarp.The results showed that 50 mL/L and 150 mL/L BPA reduced the rot rate of'Shatangju'fruits（the rot rate of treatment groups was 15% lower than that of the control group at 36 d），and increased TFC and the activities of PAL and POD in the pericarp during storage（0-20 d）at room temperature.Moreover，50 mL/L and 150 mL/L BPA lowered the rot rate of the mechanically damaged'Shatangju'fruits.More importantly，250 mL/L BPA delayed the rot and spot expansion of'Shatangju'fruits after inoculation with P.digitatum，and significantly increased TPC，TFC and the activity of PAL in the pericarp（P＜0.05）.Therefore，150 mL/L BPA had a significant effect in improving the performance of'Shatangju'fruits stored at room temperature（P＜0.05），and 250 mL/L BPA exhibited a desirable inhibition effect on P.digitatum.